Photoinduced electric currents in Bose-Einstein condensates

V. M. Kovalev, I. G. Savenko

Research output: Contribution to journalArticlepeer-review


We calculate a light-induced electric current which can occur from a Bose-Einstein condensate under the action of an external electromagnetic field with the frequency exceeding the ionization potential of the bosons, taking a system of indirect excitons as a test bed. We show that the ionization can be accompanied by the excitation of collective Bogoliubov modes. As a result, the current consists of two principal components: one regular, which has a counterpart in bosonic systems in the normal phase, and the other one specific for condensates since the photoabsorption is mediated by the emission of Bogoliubov quasiparticles. Surprisingly, the latter component soon becomes predominant with the increase of light frequency above the ionization potential.

Original languageEnglish
Article number201405
JournalPhysical Review B
Issue number20
StatePublished - 19 Nov 2018
Externally publishedYes


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